import React, { Component } from 'react';
import DemoChild111 from './child111';
//书写组件
class DemoChild11 extends Component {
    render(){
        return(
            <div className="child11">
                用户名11：{this.props.username}   
                <DemoChild111/> 
            </div>
        )
    }
}

export default DemoChild11